PATExpert: Visualization of IPC classes

The PATExpert consortium has developed a visualization on the basis of the TreeMap algorithm fort he purpose to see how a number of patent documents such as a result list splitted up on IPC classes. By means of the integrated zoom function the IPC class hierarchy can be observed from the sections down to the level of the individual subgroups.

Figure 1 shows the IPC visualization of the highest level with the sections and their subordinated classes. The coloured boxes mark the classes to which are assigned one or more patent documents of the number of results obtained in a search preformed previously. The darker the blue colour is the more patents are marked with the respective class symbol. When selecting any certain section, class, subclass or group the chosen order unit is zoomed via mouse click. Figure 2 shows the magnification of the class G03 as an example.